sendiso: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/sendiso - from package: libraw1394

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/sendiso - from package: libraw1394-tools

You may install the required package with command apt-get install {package}

Error in other languages:
sendiso: bevel nie gevind nie
sendiso: comandă negăsită
sendiso: comando não encontrado
sendiso: commande introuvable
sendiso: command not found
sendiso: käsku ei ole
sendiso: không tìm thấy lệnh
sendiso: komanda nerasta
sendiso: Kommando nicht gefunden.
sendiso: kommandot finns inte
sendiso: komut yok
sendiso: nie znaleziono polecenia
sendiso: níor aimsíodh an t-ordú
sendiso: no se encontró la orden
sendiso: no s'ha trobat l'ordre
sendiso: opdracht niet gevonden
sendiso: parancs nem található
sendiso: perintah tidak ditemukan
sendiso: príkaz nenájdený
sendiso: příkaz nenalezen
sendiso: команда не найдена
sendiso: командата не е открита
sendiso: 命令找不到
sendiso: コマンドが見つかりません